Wrong ITV regions on Sky ?

Guest

I can currently get ITV on channel 103 on Sky, and also Meridian on 9xx. The problem is that its the wrong Meridian -it is the Southampton one, but I live in Chatham, Kent and my Meridian (analogue) comes from the Bluebell Hill transmitter. I was under the impression that the station I would be watching would be based on my postcode.